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You guys are extremely polite and must have nerves made of steel. RTFM RTFM RTFM ... RTFFFFM >:-I Edward ----- Original Message ----- From: <> To: <> Sent: Thursday, March 17, 2005 3:32 PM Subject: Re: [68HC12] What function/pins to use for a transceiver?? > > I second that sentiment. A modest amount of RTFM is common courtesy for > this kind of email group. > >> MISO, MOSI, SS, SCK, TXD0, RXDO ?? |
What function/pins to use for a transceiver??
Started by ●March 17, 2005
Reply by ●March 17, 20052005-03-17
Reply by ●March 17, 20052005-03-17
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Also, I dont really appreciate sarcasm regarding when I graduate (you
hope????) Best to leave such sarcasm at the front door, true? Im sure you would
know a fair bit about HCS12's, but power trips seem to be a specialty.
George Gogos Undergraduate BACHELOR OF ENGINEERING(Computronics/Electronics) Deakin University, Australia ----- Original Message ----- From: To: Sent: Friday, March 18, 2005 12:19 AM Subject: Re: [68HC12] What function/pins to use for a transceiver?? In a message dated 3/17/05 8:12:24 A.M. Eastern Standard Time, writes: MISO, MOSI, SS, SCK, TXD0, RXDO ?? do i need TXD0 and RXD0?? George Gogos Undergraduate BACHELOR OF ENGINEERING(Computronics/Electronics) Deakin University, Australia What can I use for transmitting and receiving via a transceiver? ================================== Pretend the transmitter and receiver are a wire. Use the SCI. George, you might graduate someday (I hope), but you'll never get rich unless you dig just a little harder. Once again, do the letters SCI mean ANYTHING to you? Do you think there is any reference at all to an SCI in any HC12 manual you might be able to download? Come back with a question like "I initialized my sci for 115200 bits per second, 8 bits, no parity, but I'm missing characters at the receiver... do I need to receive with interrupts enabled?" You question is more like " How do I get From Orlando to Jacksonville?" Come on... in the next message, lets have a small list of interfaces that might be used for interprocessor communication, some of the pros and cons of each.... I hinted that you should look into using the SCI.... but you might not want to get into a discussion of which serial protocols work best over rf links yet... just get 'send one char' and 'receive one char' working first. ------ Yahoo! Groups Links a.. To |
Reply by ●March 17, 20052005-03-17
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In a message sent Thursday March 17 2005 1.19 PM (GMT) Bob Garner wrote:
- > George, you might graduate someday (I hope), but you'll never get rich > unless you dig just a little harder. Once again, do the letters SCI mean > ANYTHING > to you? Do you think there is any reference at all to an SCI in any HC12 > manual you might be able to download? Come back with a question like "I > initialized my sci for 115200 bits per second, 8 bits, no parity, but I'm > missing > characters at the receiver... do I need to receive with interrupts > enabled?" You > question is more like " How do I get From Orlando to Jacksonville?" Come > on... in the next message, lets have a small list of interfaces that > might be > used for interprocessor communication, some of the pros and cons of > each.... I > hinted that you should look into using the SCI.... but you might not want > to > get into a discussion of which serial protocols work best over rf links > yet... > just get 'send one char' and 'receive one char' working first. I do agree with Bob and I was tempted to post something earlier on the subject. I suspect that every person on this list (and there are more than a thousand) struggled on their own using a chip, a PC, and the principle of RTFM to get to grips with their chosen processor. I have supported many young people and they have all, without exception, gone through a sometimes steep and difficult learning curve, but IMHO it is the only way. I know re-inventing the wheel is not a good thing, but developing code to drive an LCD is a good learning base. I think it is very wrong for a beginner to use someone elses code - you will _never_ learn that way. In your case, George your supervisor may have provided too little time, but you might also be a typical student who has left everything to the last minute. Michael Elphick |
Reply by ●March 17, 20052005-03-17
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Guys, How old are you? Excuse me If I dont have the experience you all have, but in 16, got myself at uni at this age, doing my engineering project already, and have a very small window of time to do all this in, so I apologise if my questions seem a little basic to you.......its because I have RTFFM and am still stuck on a few things, as unlike all of you, I DO NOT KNOW THE HCS12 INSIDE OUT! Im sure you can understand this, and instead of replying back like its some sort of flaming session, just dont reply....... George Gogos Undergraduate BACHELOR OF ENGINEERING(Computronics/Electronics) Deakin University, Australia ----- Original Message ----- From: Edward Karpicz To: Sent: Friday, March 18, 2005 12:40 AM Subject: Re: [68HC12] What function/pins to use for a transceiver?? You guys are extremely polite and must have nerves made of steel. RTFM RTFM RTFM ... RTFFFFM >:-I Edward ----- Original Message ----- From: <> To: <> Sent: Thursday, March 17, 2005 3:32 PM Subject: Re: [68HC12] What function/pins to use for a transceiver?? > > I second that sentiment. A modest amount of RTFM is common courtesy for > this kind of email group. > >> MISO, MOSI, SS, SCK, TXD0, RXDO ?? ------ Yahoo! Groups Links a.. To |
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Reply by ●March 17, 20052005-03-17
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George... the serial communication interface uart is the SCI... the SPI is
the syncrounous peripheral interface.. thats the one that uses miso mosi and sck..... get the source to a SIMPLE comm program and compile it... test it by sending chars to hyperterminal thru an rs232 cable... when this works, hook it to the rf transmitter and receiver |
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Reply by ●March 17, 20052005-03-17
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Thursday, March 17, 2005, 8:50:45 AM, you wrote: GB> to do all this in, so I apologise if my questions seem a little GB> basic to you.......its because I have RTFFM and am still stuck on GB> a few things, as unlike all of you, I DO NOT KNOW THE HCS12 INSIDE GB> OUT! George... here is the thing. You actually haven't asked anything about the HCS12. You've asked about serial connections in general without every having looked at the difference between SPI and UARTs. The question made it obvious that you hadn't actually looked at the manual seriously beyond the pinout of the chip. Its not that people don't want to help here, its just that they aren't going to help people that don't help themselves. Beyond that, use the UART (RXD/TXD). Aaron |
Reply by ●March 17, 20052005-03-17
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George, I am a former electronics college instructor who taught the 68HC11, and am presently working on my MSc using the '12. If you are 16 years old and in Uni, then it would be my pleasure to answer whatever questions you have, as long as I can fit it in with my own studies :-) (I know what it is like to be a teenaged genius trying to learn about the world!) Email me directly as nw.johnson at ieee.org if you want to avoid flames, or use the list if you want to experience the ways of the world. your choice. I am also a ham, so I know a little bit about RF! I'm sitting here ten hours a day working on the stuff, so it is fresh in my mind! You can repay me by buying me a Foster's, when you are old enough! cheers, Nigel -- Nigel Johnson MCSE, MIEEE VE3ID/G4AJQ http://nigel.homelinux.net If time travel ever will be possible, it already is. Ask me again yesterday |
Reply by ●March 17, 20052005-03-17
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George, Yes, most of us are older than you. I am for example 34. We would like to help you, and this is why we suggest that you learn well the manual of the MC9S12E128 that your are using, before you are trying to do complicated stuff. You are writing that you are under an extreme time pressure on this task, but since we are experienced we know that when getting a new microcontroller to work there are no shortcuts. This is true especially if the task is to learn from the project, rather than simply "get it working, no matter how". Bob Garner suggested you look at the SCI. What you were expected to do is then invest AT LEAST two hours in studying the Freescale documentation of the SCI module, and read in the MC9S12E128 Device Guide relevant sections. Then after two hours if you have questions that are still unclear you can come back to the list, and say, I read this and this, but I don't understand exactly how to do this and this. Then you will receive much better help. People got nasty to you, because they suggested things, like reading the manual, but from your immediate follow up questions, it was obvious you did not spend the proper time to follow the suggestion. This got on people's nerves, and this is the reason for the offending replies. On top of this, people were not aware of your young age. Please take the suggestions you receive here, and make the necessary time investment to research them. There can be no shortcuts. Your age, and the fact you are learning in a University suggest you are gifted and smart. The recent incident from today, is because you are in-experienced with life. The important lesson is - sometimes (often) it is not possible or advisable to take shortcuts. Hope this helps, Doron At 00:50 18/03/2005 +1100, you wrote: >Guys, > >How old are you? Excuse me If I dont have the experience you all have, but >in 16, got myself at uni at this age, doing my engineering project >already, and have a very small window of time to do all this in, so I >apologise if my questions seem a little basic to you.......its because I >have RTFFM and am still stuck on a few things, as unlike all of you, I DO >NOT KNOW THE HCS12 INSIDE OUT! Im sure you can understand this, and >instead of replying back like its some sort of flaming session, just dont >reply....... >George Gogos >Undergraduate >BACHELOR OF ENGINEERING(Computronics/Electronics) >Deakin University, Australia > ----- Original Message ----- > From: Edward Karpicz > To: > Sent: Friday, March 18, 2005 12:40 AM > Subject: Re: [68HC12] What function/pins to use for a transceiver?? > You guys are extremely polite and must have nerves made of steel. > > RTFM RTFM RTFM ... RTFFFFM >:-I > > Edward > ----- Original Message ----- > From: <> > To: <> > Sent: Thursday, March 17, 2005 3:32 PM > Subject: Re: [68HC12] What function/pins to use for a transceiver?? > > > > I second that sentiment. A modest amount of RTFM is common courtesy for > > this kind of email group. > > > >> MISO, MOSI, SS, SCK, TXD0, RXDO ?? > >------ > Yahoo! Groups Links > > a.. To >Yahoo! Groups Links > > |
Reply by ●March 17, 20052005-03-17
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Sorry George! I had no idea you were a young genius! Why didn't you tell us sooner? I'm 62, if you want to know, and almost (but not quite) burnt out! Michael Elphick |
Reply by ●March 17, 20052005-03-17
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<big snip> It is with some trepidation that I join this thread but --- There is a bit more to it than just hooking up arbitrary signals to the modulation port of an RF transceiver and expecting the identical modulation to come out the other end. George has some more reading to do -- 1. What are the characteristics of the modulation port?? What is its bandwidth? Does that bandwidth extend to DC? 2. It may be more simple to ask, "Was this device _designed_ for data transmission? If so, what data formats does it support? What clock speeds? The answers to the above questions will tell George whether he can simply hook this thing up to a data port on an MCU or whether he has to include a modem in the interface to convert the signal format. It should be noted that direction connection to an SCI or SPI port will require that the Tx bandwidth extend to or at least approach DC. The upper end of the modulation pass band will determine the maximum data rate that he can support. This is going require that George do even more reading and report back to us with some technical details. Best wishes, Bob Smith --- Avoid computer viruses, Practice safe hex --- -- Specializing in small, cost effective embedded control systems -- http://www.smithmachineworks.com/embedprod.html Robert L. (Bob) Smith Smith Machine Works, Inc. 9900 Lumlay Road Richmond, VA 23236 804/745-2608 |
